[ON HOLD] Implement pull-based design for content decoding

net/filter/stream_source.cc

Index: net/filter/stream_source.cc
diff --git a/net/filter/stream_source.cc b/net/filter/stream_source.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8291e01256949d775bbe0cbd197303d98a79392b
--- /dev/null
+++ b/net/filter/stream_source.cc
@@ -0,0 +1,15 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/filter/stream_source.h"
+
+namespace net {
+
+StreamSource::StreamSource(SourceType type,
+                           std::unique_ptr<StreamSource> previous)
+    : type_(type), previous_(std::move(previous)) {}
+
+StreamSource::~StreamSource() {}
+
+}  // namespace net